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You are here: Home / Archives for K S Baskar

K S Baskar

Descriptive Statistics – Mean and Median; Divisibility

November 10, 2010 By K S Baskar 1 Comment

How many numbers of 7 consecutive positive integers are divisible by 6?1) Their average is divisible by 62) Their median is divisible by 12 … [Read more...] about Descriptive Statistics – Mean and Median; Divisibility

Number Properties – divisibility and remainders

November 8, 2010 By K S Baskar 1 Comment

When a positive integer A is divided by 5 and 7, the remainders obtained are 3 and 4, respectively. When the positive integer B is divided by 5 and 7, the remainders obtained are 3 and 4, respectively. Which of the following is a factor of (A - B)? (A) 12 (B) 24 (C) 35 (D) 16 (E) 30 Correct Answer : Choice C Explanatory Answer When A is divided by 5, the remainder is 3. So, … [Read more...] about Number Properties – divisibility and remainders

DS – Quadratic, Parabola, and Inequalities

November 8, 2010 By K S Baskar 1 Comment

In xy-plane, Y = ax^2 + bx + c, does the graph intersect with X axis?1) a > 02) c < 0 … [Read more...] about DS – Quadratic, Parabola, and Inequalities

Number properties – Factorial

November 8, 2010 By K S Baskar Leave a Comment

How many trailing zeroes does 60! have?(A) 12(B) 9(C) 15(D) 14(E) 13 … [Read more...] about Number properties – Factorial

Permutation of Digits & Divisibility

November 8, 2010 By K S Baskar Leave a Comment

Rearrangement of digits of a number

This is an interesting counting methods question that combines a very basic rule of test of divisibility of number by 3. Question How many six digit positive integers comprising only the digits 1 and 2 can be formed such that the number is divisible by 3? 3 20 22 38 360 Correct Answer Choice C. 22 such numbers can be formed. Video Explanation Explanatory … [Read more...] about Permutation of Digits & Divisibility

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